Eye Lash

JUL-AUG 2017

Eye Lash covers the latest makeup, eyelash extension and eyebrow trends for makeup artists, lash and brow stylists, and other beauty industry professionals who provide eyelash extension, eyebrow shaping and makeup application services.

Issue link: http://eyelashmag.epubxp.com/i/846913

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34 eye | la | JULY/AUGUST 2017 | eyelashmag.com by Tracy Morin Humidity levels affect adhesive—and, therefore, lash bonding and retention. Achieve optimal results in any environment with these pro tips. TOO MUCH—OR NOT ENOUGH— humidity in your lashing room can lead to some sticky situations for cyanoacrylate (CA) adhesives used for lash extensions. Here's the science: According to Stefani Altieri, medical esthetician and master lash educator for The Lash Shop/ StellaLash Academy in Howell, New Jersey, CA is an acrylic resin that rapidly polymerizes in the presence of moisture, forming long, strong chains, joining the bonded surfaces together. Hence, humidity can affect adhesives' curing time, potentially preventing effective bonds or retention. "As humidity levels rise, so too does the speed with which the molecular bonds between synthetic extensions and natural eyelashes form," explains Sophy Merszei, molecular biologist, CEO and founder of Houston- based NovaLash. However, "humidity is relative," notes Joanne Douglass, a certifi ed NovaLash educator in New Century, Kansas. Yes, CA is more affected by relative STICKING POINTS humidity than absolute humidity; absolute humidity is defi ned by the measure of water molecules (vapor) in the air, regardless of temperature and other factors. On the other hand, "[relative humidity] levels are based on temperature, absolute vapor density and saturation vapor density," explains Douglass. For instance, "a fl uctuation in temperature can cause relative humidity levels to rise and fall," Merszei explains, so you need to factor in temperature too. However, don't attempt to alter your space's heating or air-conditioning so much so that your client becomes uncomfortably chilly or overheated. Before overdoing the climate control in an attempt to adjust relative humidity for prime CA bonding, you'll want to fi rst employ humidifi ers or dehumidifi ers—and lucky you, we've tapped experts who not only break down which type you'll need to humidity-proof your business, but also offer up a bevy of easily adapted tips to humidity-proof your adhesive results. CAUSE AND EFFECT How exactly does air's moisture affect adhesives? Generally, Altieri explains, the higher the environment's relative humidity, the faster the product cures. She recommends 40-percent to 70-percent relative humidity

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